1905493 has 2 divisors, whose sum is σ = 1905494. Its totient is φ = 1905492.

The previous prime is 1905473. The next prime is 1905499. The reversal of 1905493 is 3945091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1397124 + 508369 = 1182^2 + 713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1905493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1905499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952746 + 952747.

It is an arithmetic number, because the mean of its divisors is an integer number (952747).

2^1905493 is an apocalyptic number.

It is an amenable number.

1905493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1905493 is an equidigital number, since it uses as much as digits as its factorization.

1905493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 1905493 is about 1380.3959576875. The cubic root of 1905493 is about 123.9754764198.

The spelling of 1905493 in words is "one million, nine hundred five thousand, four hundred ninety-three".